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Table 2 Antioxidant activity of Baizhi taproot and lateral root at three growth stages

From: Influence of harvest stage on the pharmacological effect of Angelica dahurica

Harvest stage Taproot Lateral root
DPPH radical scavenging capacity
 V-stage 5.70 ± 4.54a* 5.07 ± 5.20a
 B-stage 6.46 ± 3.06a 6.76 ± 5.37a
 S-stage 10.92 ± 3.82b 6.12 ± 5.12a
Fe2+ chelating capacity
 V-stage 2.52 ± 7.13a 2.55 ± 6.13a
 B-stage 1.66 ± 1.70a 1.90 ± 1.74a
 S-stage 11.94 ± 6.09b 2.65 ± 6.33a
  1. Roots were extracted with methanol and subjected to DPPH and Fe2+ chelating assay. Activity of extracts is shown as mean ± SD IC50 (mg/ml) predicted by Loess regression
  2. * Different letters indicate statistical significance (p < 0.05) by t test